389235290 has 8 divisors (see below), whose sum is σ = 700623540. Its totient is φ = 155694112.

The previous prime is 389235289. The next prime is 389235293. The reversal of 389235290 is 92532983.

It can be written as a sum of positive squares in 2 ways, for example, as 389233441 + 1849 = 19729^2 + 43^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×389235290² = 303008221962768200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (389235293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19461755 + ... + 19461774.

Almost surely, 2^389235290 is an apocalyptic number.

389235290 is a deficient number, since it is larger than the sum of its proper divisors (311388250).

389235290 is a wasteful number, since it uses less digits than its factorization.

389235290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38923536.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 389235290 is about 19729.0468598967. The cubic root of 389235290 is about 730.1365166591.

The spelling of 389235290 in words is "three hundred eighty-nine million, two hundred thirty-five thousand, two hundred ninety".